55 lines
859 B
Go
55 lines
859 B
Go
// Utilities.
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package util
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import (
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"errors"
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"net"
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)
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type mynet struct{}
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// Network utilities.
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var Net = mynet{}
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// LocalIP gets the first NIC's IP address.
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func (*mynet) LocalIP() (string, error) {
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tt, err := net.Interfaces()
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if err != nil {
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return "", err
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}
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for _, t := range tt {
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aa, err := t.Addrs()
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if err != nil {
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return "", err
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}
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for _, a := range aa {
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switch ip := a.(type) {
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case *net.IPAddr:
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v4 := ip.IP.To4()
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if v4 == nil || v4.IsLoopback() || v4.IsUnspecified() {
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continue
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}
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return v4.String(), nil
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case *net.IPNet:
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v4 := ip.IP.To4()
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if v4 == nil || v4.IsLoopback() || v4.IsUnspecified() {
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continue
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}
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return v4.String(), nil
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default:
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return "", errors.New("cannot find local IP address")
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}
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}
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}
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return "", errors.New("cannot find local IP address")
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}
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